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Precipitation patterns control the distribution and export of large wood at the catchment scale
| Title: | Precipitation patterns control the distribution and export of large wood at the catchment scale |
| Authors: | Il Seo, Jung Browse this author | | Nakamura, Futoshi Browse this author →KAKEN DB | | Chun, Kun Woo Browse this author | | Kim, Suk Woo Browse this author | | Grant, Gordon E. Browse this author |
| Keywords: | large wood distribution | | disturbance regime | | channel morphology | | supply-limited | | transport-limited | | Japanese archipelago |
| Issue Date: | 29-Nov-2015 |
| Publisher: | Wiley-Blackwell |
| Journal Title: | Hydrological Processes |
| Volume: | 29 |
| Issue: | 24 |
| Start Page: | 5044 |
| End Page: | 5057 |
| Publisher DOI: | 10.1002/hyp.10473 |
| Abstract: | Large wood (LW) plays an important role in river ecosystems, but LW-laden floods may cause serious damage to human lives and property. The relationship between precipitation patterns and variations in LW distribution and export at the watershed scale is poorly understood. To explore these linkages, we examined differences in LW distribution as a function of channel morphologies in six watersheds located in southern and northern Japan and analysed the impacts of different precipitation patterns on the fluvial export of LW from river catchments. In southern Japan, intense rainfalls caused by typhoons or localized torrential downpours initiate landslides and debris flows that introduce massive amounts of LW into channels. Gravel bars formed by frequent flood events are widely prevalent, and the LW temporarily stored on these bars is frequently moved and/or broken into smaller pieces by floods. In these systems fluvial export of LW is supply-limited, with smaller accumulations and shorter residence times than in northern Japan. Conversely, in northern Japan, where typhoons and torrential downpours rarely occur, LW is mostly recruited by bank erosion, tree mortality and windthrow into channels, rather than by landslides and debris flows. Recruited pieces accumulate in log jams on valley floors, particularly on floodplains supporting mature forests, resulting in larger accumulations and longer residence times. In these watersheds fluvial export of LW is transport-limited, and the pieces gradually decompose during long-term storage as log jams. Copyright (C) 2015 John Wiley & Sons, Ltd. |
| Rights: | This is the peer reviewed version of the following article: Precipitation patterns control the distribution and export of large wood at the catchment scale, Hydrological Processes, 29(24), pp5044-5057, 2015-11-29, which has been published in final form at 10.1002/hyp.10473. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving. |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/63688 |
| Appears in Collections: | 農学院・農学研究院 (Graduate School of Agriculture / Faculty of Agriculture) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 中村 太士
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